After the autumn peanut flower, the root dressing should be paid attention to

After the autumn peanut flower enters the lower needle-pod stage, the temperature gradually decreases, and the rain begins to decrease, which will affect the growth of some above-ground vines and leaves to varying degrees. However, this is the key period for the growth of autumn peanuts. Therefore, the use of root-external top dressing method to supplement nutrient deficiency in time can enhance the growth stamina, prevent premature fading of stems and leaves, and effectively increase the seed setting rate and fruit filling rate. The following are the types of root dressings that need to be rooted after autumn peanuts:

Nitrogen, phosphorus and potassium can meet the needs of effective pod development for NPK nutrients, increase the number of effective pods and pod fruit filling, and have significant yield-increasing effects. For the presence of phosphorus deficiency and potassium deficiency, 0.2 kg of potassium dihydrogen phosphate solution can be sprayed evenly over the leaf surface. At the same time, there may be 0.5 to 1 kg of urea per acre of nitrogen deficiency.

Boron fertilizer and boron fertilizer can promote pollen germination, which is conducive to pollination and fertilization, increase fruit set rate, and increase chlorophyll content to prevent physiological diseases. 120 grams of borax per acre is 50 kilograms of water, which is sprayed once during the full bloom period of the autumn peanuts and the fruit filling period. Note: Borax should be dissolved with a small amount of water and then diluted with water.

Molybdenum and molybdenum have the effect of promoting the nitrogen fixation of peanut rhizobium, and timely supplementing molybdenum fertilizer during the needle-podding period of autumn peanuts, which is beneficial to increase the fruit weight. 50 kg of water with 50 g of ammonium molybdate was sprayed once each time during the full bloom period and the pod filling period.

Iron fertilizer peanuts are extremely sensitive to iron. Peanut planting in alkaline soil is prone to iron deficiency, showing yellowing whitening symptoms. Spraying iron fertilizer in time can make the color of peanut leaves turn from white to green within a few days, avoiding and alleviating the harm caused by iron deficiency. When the symptoms of yellowing occur in the peanut flowering period, the pod-forming stage or the new leaves, the 0.2% ferrous sulfate solution is sprayed on the foliar surface, usually once every 5 to 6 days, and continuously sprayed 2 to 3 times.

When manganese fertilizer is deficient in manganese, brown spots appear on the edge of the leaves, flowering and maturity are delayed, and pods are poorly developed. Severe manganese deficiency, chlorosis between veins, its typical appearance is "wet spot disease". In particular, the availability of manganese in alkaline soil is low, and manganese deficiency is prone to occur. Applying manganese fertilizer to manganese-deficient soil can increase peanut yield by more than 10%. From the beginning of the peanut into the fruit needle expansion period to 15 to 20 days before the harvest, every 10 to 14 days, evenly spray 50-60 kg of 0.1% manganese sulfate solution per acre.

The application of micro-fertilizer after photosynthetic micro-fertilizer peanut flower can not only meet the needs of various trace elements, but also inhibit light respiration, reduce consumption, improve photosynthetic efficiency, promote pod fullness and fullness, and obviously increase yield. In the autumn peanut flowering period and the pod filling period, 100 g of photosynthetic micro-fertilizer per acre is sprayed evenly with 50 kg of water. Note that the application time is preferably after 3 pm on a cloudy or sunny day.

Source: Shandong Science and Technology News
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